Part 28

JOHNSON, G. A. Report on sewage purification at Columbus, Ohio, made to the chief engineer of the Board of Public Service, p. 47, 1905.

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KIMBERLEY, A. E., and HOMMON, H. B. The practical advantages of the Gooch crucible in the determination of the total and volatile suspended matter in sewage: Pub. Health Papers and Repts., Am. Pub. Health Assoc., Vol. 31, pt. 2, pp. 123–35, 1905.

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LEACH, A. E. Food inspection and analysis, pp. 493, 495, and 497, John Wiley & Sons, New York, 1904.

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a. LEDERER, ARTHUR. A new method for determining the relative stability of sewage, effluent, or polluted river water: J. Infect. Diseases, Vol. 14, pp. 482–97, 1914.

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b. ——. A serious fallacy of the “standard” methylene blue putrescibility test: Am. J. Pub. Health, Vol. 4 (old series Vol. 10), pp. 241–8, 1914.

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c. ——. Notes on the practical application of the “saltpeter method” for determining the strength of sewages: Am. J. Pub. Health, Vol. 5, pp. 354–61, 1915.

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d. ——. Determination of the biochemical oxygen demand by the saltpeter method in stockyards, tannery, and corn products wastes: J. Ind. Eng. Chem., Vol. 7, pp. 514–6, 1915.

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LEEDS, A. R. Estimation by titration of dissolved carbon dioxide in water: J. Am. Chem. Soc., Vol. 13, pp. 98–9, 1891.

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——. The alteration of standard ammonium solutions when kept in the dark: Proc. Am. Chem. Soc., Vol. 2, p. 1, 1878.

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LEFFMAN, HENRY. Examination of water, 3d ed., pp. 46–50, P. Blakiston’s Son & Co., Philadelphia, 1895;

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